== sanity test 255a: check 'lfs ladvise -a willread' ===== 22:25:49 (1761963949)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.84078 s, 18.0 MB/s
ladvise: range [2, 1] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: range [2, 2] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: conflicting arguments of -l and -e
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

Synchronous ladvise should wait
fail_val=8
fail_loc=0x237
Asynchronous ladvise shouldn't wait
llite.lustre-ffff8e870723d000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.07275
Iter 1/10: OSS cache speed: 2.40697
Iter 1/10: ladvise speed: 2.44708
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.33362
Iter 2/10: OSS cache speed: 2.53563
Iter 2/10: ladvise speed: 2.33342
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.11271
Iter 3/10: OSS cache speed: 2.57141
Iter 3/10: ladvise speed: 2.27565
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.27637
Iter 4/10: OSS cache speed: 2.27892
Iter 4/10: ladvise speed: 2.29292
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.04297
Iter 5/10: OSS cache speed: 2.19582
Iter 5/10: ladvise speed: 1.41899
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.58586
Iter 6/10: OSS cache speed: 2.05066
Iter 6/10: ladvise speed: 2.55468
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.89441
Iter 7/10: OSS cache speed: 2.27531
Iter 7/10: ladvise speed: 2.49503
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.35508
Iter 8/10: OSS cache speed: 2.06937
Iter 8/10: ladvise speed: 2.39946
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.18509
Iter 9/10: OSS cache speed: 1.68773
Iter 9/10: ladvise speed: 1.28409
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.18001
Iter 10/10: OSS cache speed: 1.31375
Iter 10/10: ladvise speed: 1.31587
Average uncached read: 1.90
Average speedup with OSS cached read:  2.13 = +12%
Average speedup with ladvise willread:  2.08 = +9%
Speedup with OSS cached read less than 20%,  got 12%. Skipping ladvise willread check.
fail_loc=0